Example usage for java.util List isEmpty

Introduction

In this page you can find the example usage for java.util List isEmpty.

Prototype

boolean isEmpty();

Source Link

Document

Returns true if this list contains no elements.

Usage

From source file:Main.java

public static <T> boolean isEmpty(List<T> list) {
    return list == null || list.isEmpty();
}

From source file:Main.java

public static boolean isEmpty(List photos) {
    return !(photos != null && photos.isEmpty());
}

From source file:Main.java

/**
 * Random parameter returns random item from list.
 * //from w  ww .j  a v  a  2  s  .c o  m
 * @param <E>
 *            Class for list where you get random item.
 * @param e
 *            A random parameter for the array.
 * @return A random item from a list.
 */
public static <E> E randomItem(List<E> e) {
    if (e.isEmpty()) {
        return null;
    }
    return e.get(RANDOM.nextInt(e.size()));
}

From source file:Main.java

public static <T> boolean isEmpty(List<T> list) {
    if (list == null || list.isEmpty()) {
        return true;
    }//from www. j  av  a 2  s.c  o m

    return false;
}

From source file:Main.java

public static boolean isBlank(List list) {
    return (list == null || list.isEmpty());
}

From source file:Main.java

/** Returns the last element in list or <code>null</code>, if list is empty. */
@SuppressWarnings("unchecked")
public static <T> T getLast(List<T> list) {
    if (list.isEmpty()) {
        return null;
    }/*ww  w .jav a2  s.  com*/
    if (list instanceof Deque<?>) {
        return ((Deque<T>) list).getLast();
    }
    return list.get(list.size() - 1);
}

From source file:Main.java

public static <T extends Object> T[] toArray(List<T> list) {
    if (list == null || list.isEmpty())
        return null;

    T[] array = (T[]) Array.newInstance(list.get(0).getClass(), list.size());
    for (int i = 0; i < array.length; i++)
        array[i] = list.get(i);/*  w ww  .  j a  v a2 s .  c o  m*/
    return array;
}

From source file:Main.java

private static boolean checkNotEmpty(List list) {
    return list != null && !list.isEmpty();
}

From source file:Main.java

/**
 * /*from w  ww  .ja  v  a  2  s .  com*/
 * @param <T>
 * @param list
 */
public static <T> void filterNulls(List<T> list) {
    if (null == list || list.isEmpty())
        return;
    for (int i = 0; i < list.size(); i++) {
        T current = list.get(i);
        if (null == current) {
            list.remove(i);
        }
    }
}

From source file:Main.java

private static <A> List<A> reverse(List<A> as, List<A> acc) {
    return as.isEmpty() ? acc : reverse(tail(as), cons(head(as), acc));
}